Shock-absorber.



I. C. NELSON. suocmasona'sa. APPLICATION HLED- MAY l6. l9l8.

1,293,166. Patented Feb. 4; 1919.

T all whom it may concern:

B'e itv known that I; Invrxo C. Nnnsoxga zen ofethe United States,residing at San ',.-'Krisel11io, in the county of Marin and State :of California, have invented a new and usefnl lmprovement in shockrAbsorbers, of

I s-lvlrich the following is a specification,

I I-My invention relates toimprovements in l shock absorbers for the type of motor vehiole springs known as semi-cantaliver springs wherein a radius member operates in conjunction with a pair of springs to resiliently secure the flexible ends ofsaid semi-cantaliver springs upon the axles of the vehicle; and the objects of my invention are First, to provide an improved shock absorber for semi-cantaliver springs;

Second, to provide improved means for resiliently mounting the flexible ends of semi-cantaliver springs 0n the axles of ,a-

vehicle; and Third. to provide an improved device of 1 the character described. having means for preventing a lateral movement in a horizonwhich- Figure 1 is a broken side elevation of the front side portion of a motor vehicle the near wheel being removed to disclose the manner inwhich the flexible endsof the semi cantaliver springs are resiliently mounted upon the front aXle of the vehicle; and

Fig. 2 is a front elevation, on an enlarged sca e, of a portion of a front axle disclosing the means for preventing a lateral movement of the flexible ends of the semicantaliver springs.

Referring to the drawings the numeral 1 is used to designate the frame or chassis of a motor vehicle to which, in the present state of the art, are secured brackets 2..

l ihat'l' term the rigid ends 3 of semi-canta liver springs 4 are rigidly secured tothe chassisi'l by means of said bracket 2 whll e the front or flexible ends 5 of said sermcantali-yer springs 4.- are, at present, secured to the front axle 6' of the vehicle.

The arrangement for the rear axle is sub- Specification of Letters Patent.

' Application filed May 16, 1918.

'ing rigidly secured to the rrnn sa'rns Parana orrrca SHOCK-ABSORBER.

Patented Feb. 4a 1912. serial No. 235,030.

stantially similar in construction and operation. Therefore a despription of the front axle w1ll suflice.

In my invention I disconnect the front or flexible ends 5 of the :i: from the axle 6.

A radius member 7 is secured below the lowermost leaf of the springs at by means of bolts 8 passing through the bracket 2 and said member 7 at one end,- the other end beaxle 6 in place of the removed front or flexible end 5 of the springs l, or, more correctly, of the lowermost leaf of said springs l, as disclosed in Fig. l of the drawings.

A vertically disposed bolt 9 is secured to senli-cantaliver springs the axle 6 and 'slidably'engages the front or flexible end 5 of the lowermost leaf of the springs l. A pair of springs 12 and ll are mounted upon the bolt and above and below the end 5 of the spring a, said springs 12 and 14: resting within suitable cup-washers 10 and 11 at opposite ends of the bolt 9. Other cup washers are interposed between the adjacent ends of the springs 12 and 1a and the front end 5 of the spring lto retain the said springs 12 and 14- in alinement. The tension of said springs 12 and 14 may be adjusted by means of suitable check nuts 16 mounted upon the upper end of the bolt 9 T o prevent a lateral movement of the free or flexible end 5 of the springs etin a horizontal plane I have provided vertically dis posed guides 17 which are secured to the axle 6 and arranged on each side of the free ends '5 of the springs 4:.

In operation the radius member 7 operates as a radius rod to retain the proper position of the chassis or frame 1 relatively to the axle 6 so that the flexible ends of the springs 4 may move relatively to said axle 6.

A vertical movement of the flexible ends 5 of the Springs 4 upon the bolts 9 is resiliently resisted by means of the springs 12 and 14: thereby providing an effective and adjustable means whereby excessive road shocks may be partially absorbed thereby relieving the semi-cantaliver springs of undue shocks, the tension of the said springs 12 and 14 being readily adjusted by the nuts 16 on the upper ends of the bolts Any lateral movement, in a horizontal plane, of the flexible ends 5 of the springs 42 will be prevented by the vertically disposed guides 17 on the axle 6.

It is obvious from the foregoing that I for semi-cantaliver springs.

Having thus and desire to secure by Let- I claim as new ters Patent is 1. The combination with a motor vehicle 'havirig semi-cantaliver springs with their rigid ends rigidly secured to the frame of the vehicle and their flexible ends resting over the axles of said vehicle of a shock ab-' sorber comprising a radius member lying directly under said springs and having one end secured to said rigid ends and the other end to one of the axles of said vehicle and directly under the flexible ends of said springs; a vertically disposed bolt secured to the forward end of the radius member and slidably engaging the flexible ends of the springs; and a .pair of springs mounted upon the bolt, one on either side of the flexible ends of the semi-cantaliver springs to resiliently resist a vertical movement of said flexible ends.

2. The combination with a motor vehicle having semi-cantaliver springs with their rigid ends rigidly secured to the frame of the vehicle and their flexible ends resting over the axles of said vehicle of a shock absorber comprising a radius member lying directly under said springs and having one end secured to said rigid ends and the other end to one of the axles of said vehicle and directly under the flexible ends of said springs; a vertically disposed bolt secured 1.2es,1ee

rigid ends rigidly secured to the frame of the vehicle and their flexible ends resting over the axles of said vehicle of a shock absorber comprising a, radius member lying directly under said springs and having one end secured to said rigid ends and the other end to one of the axles of said vehicle and directly under the flexible ends of said springs; a vertically disposed bolt secured to the forward end of the radius member and slidably engaging the flexible ends of the springs; and a pair of springs mounted upon the bolt, one on either side of the flexible ends of the semi-cantaliver springs to resiliently' resist a vertical. movement of said flexible ends; and vertical guides mounted upon the axles of the vehicle and on each side of the flexible ends of the springs to prevent a lateral movement in a horizontal plane of said flexible ends.

In witness whereof I hereunto set my signature.

IRVING C. NELSON. 

